ci: add GitHub Actions workflows and git hooks for automated testing

- Add CI workflow for testing on Node.js 20.x and 22.x
- Add PR checks for title validation, security audit, and bundle size
- Add pre-commit hook for linting and testing staged files
- Add pre-push hook for full test suite validation
- Configure husky and lint-staged for git hook management

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <[email protected]>

Author: interpret-tech

.github/workflows/ci.yml

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+name: CI
+
+on:
+  push:
+    branches: [ master, main ]
+  pull_request:
+    branches: [ master, main ]
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    
+    strategy:
+      matrix:
+        node-version: [20.x, 22.x]
+    
+    steps:
+    - uses: actions/checkout@v4
+    
+    - name: Use Node.js ${{ matrix.node-version }}
+      uses: actions/setup-node@v4
+      with:
+        node-version: ${{ matrix.node-version }}
+        cache: 'npm'
+    
+    - name: Install dependencies
+      run: npm ci
+    
+    - name: Run linter
+      run: npm run lint
+    
+    - name: Run tests with coverage
+      run: npm run coverage
+    
+    - name: Upload coverage reports
+      uses: codecov/codecov-action@v4
+      with:
+        file: ./coverage/lcov.info
+        flags: unittests
+        name: codecov-umbrella
+        fail_ci_if_error: true
+      if: matrix.node-version == '20.x'
+
+  build:
+    runs-on: ubuntu-latest
+    needs: test
+    
+    steps:
+    - uses: actions/checkout@v4
+    
+    - name: Use Node.js 20.x
+      uses: actions/setup-node@v4
+      with:
+        node-version: 20.x
+        cache: 'npm'
+    
+    - name: Install dependencies
+      run: npm ci
+    
+    - name: Build TypeScript
+      run: npm run build
+      
+    - name: Check TypeScript types
+      run: npm run type-check

.github/workflows/pr-checks.yml

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+name: PR Checks
+
+on:
+  pull_request:
+    types: [opened, synchronize, reopened]
+
+jobs:
+  lint-pr-title:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check PR title
+        uses: amannn/action-semantic-pull-request@v5
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        with:
+          types: |
+            feat
+            fix
+            docs
+            style
+            refactor
+            test
+            chore
+            perf
+            ci
+            revert
+
+  security-audit:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      
+      - name: Use Node.js 20.x
+        uses: actions/setup-node@v4
+        with:
+          node-version: 20.x
+          cache: 'npm'
+      
+      - name: Install dependencies
+        run: npm ci
+      
+      - name: Run security audit
+        run: npm audit --audit-level=moderate
+
+  size-check:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      
+      - name: Use Node.js 20.x
+        uses: actions/setup-node@v4
+        with:
+          node-version: 20.x
+          cache: 'npm'
+      
+      - name: Install dependencies
+        run: npm ci
+      
+      - name: Check bundle size
+        run: npm run cost

.husky/pre-commit

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+npx lint-staged

.husky/pre-push

@@ -0,0 +1,3 @@
+npm run lint
+npm run coverage
+npm run type-check